The fence, wall and/or planting shall be continuous, except for reasonable gaps necessary for site identification and marketing. This shall be construed to require that the fence, wall and/or planting shall extend for a length of at least 80% of the length of the site perimeter toward which the doors face; provided, however, that no such fence or wall shall be permitted in the front yard, and the portion of the site perimeter abutting the front yard shall be excluded in making calculations of the required or proposed fence or wall length. Furthermore, and notwithstanding the foregoing, the continuous length of any portion of such fence or wall shall not be less than twice the length of the longest gap in such fence or wall, the continuous length of any permitted gaps in such fence or wall shall not exceed 100 feet, and the permitted gaps in screening shall not occur along that portion of the site perimeter abutting or facing an area where outdoor storage is provided.